# a = 1
# b = 2

# if (a == b):
#   print('a的值等于b的值！')
# else:
#   print('a的值不等于b的值！')

# print('程序运行结束！')

age = 50
if (age < 18):
  print('你还未成年!')
elif (age < 30):
  print('你已经成熟了!')
elif (age < 40):
  print('你想当成熟了!')
else:
  print('我都不知道说啥了!')

print('程序运行结束！')